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HomeMy WebLinkAbout7 Trenton St septic3SEPTIC TANK INSTALL RISERS & COVERS OVER INLET & OUTLET AND SET TO 6" OF FINISH GRADE FF EL.=97.8f -TOF EL.=96.9t -F.G. EL.=96.6f ,— F.G. EL.=98.0f L = 18' © S=1% (MIN.) 4"SCH40 PVC 10" INV.=95.15 t 4" 48" LIQUID LEVEL ADD GAS BAFFLE IV09109I 1201 INSTALL NEW SEWER OUTLET AT HOUSE, INV.=95.5 NOTES: 1) CONTRACTOR SHALL VERIFY ALL EXISTING PIPE INVERTS, PRIOR TO INSTALLATION. 2) SEPTIC TANK & D-BOX SHALL BE SET LEVEL AND TRUE TO GRADE ON A MECHANICALLY COMPACTED SIX INCH CRUSHED STONE BASE, AS SPECIFIED IN 310 CMR 15.221 (2). 3) INSTALL INLET & OUTLET TEES AS REQUIRED. 4) GAS BAFFLE TO BE INSTALLED ON OUTLET TEE AS MANUFACTURED BY TUF-TITE, ZABEL OR EQUAL. DESIGN CRITERIA PROPOSED D—BOX INSTALL RISER & WATERTIGHT COVER SET TO 6" OF GRADE F.G. EL.=98.0t L= 31' I I L=8' © S=1% (MIN.) @ S=1% (MIN.) 4'SCH40 PVC 4"SCH40 PVC 10.75" TO INVERT - INV.=94.55J PROPOSED \-INV.=94.48 INV.=94.90 D—BOX INV.=94.40 NOTE: STONE BETWEEN CHAMBERS IS FOR AIR MOVEMENT & STRUCTURE BREAKOUT=TOP • TOP ELEV.=94.83 - INV. ELEV.=94.40 — BOTTOM ELEV.=93.50 5' MIN. ABOVE ESTIMATED HIGH GROUNDWATER ADJUSTED G.W., EL=88.5 J- SEPTIC SYSTEM PROFILE NUMBER OF BEDROOMS: 2 BEDROOMS SOIL TEXTURAL CLASS: CLASS I DESIGN PERCOLATION RATE: <2 MIN/IN DAILY FLOW: 220 GPD DESIGN FLOW: 330 GPD GARBAGE GRINDER: NO—S.A.S. IS NOT DESIGNED FOR GARBAGE GRINDER LEACHING AREA REQUIRED: (330 GPD) = 445.9 SF 74 GPD/SF PROPOSED SEPTIC TANK: 1500 GALLON CAPACITY H-20 RATED PROPOSED D—BOX: 1 INLET, 5 OUTLET (MINIMUM), H-20 RATED USE 6 ROWS OF 5—ADS Arc 36 HC HD UNITS WITH NO STONE AND NO SEPARATION BETWEEN EACH ROW BOTTOM AREA: (GENERAL USE APPROVAL FOR 4.80 SF/ LF OF UNIT) (Arc36 Units) 30 UNITS x 5.0 LF x 4.80 SF/LF = 720.0 SF TOTAL AREA = 720.0 SF DESIGN FLOW PROVIDED: 0.74 GPD/SF(720.0 SF) = 532.8 GPD NOMINAL BOTTOM AREA = 17' x 25' = 425 SF (400 SF MIN. RECOMMENDED) NOTE: TO PREVENT BREAKOUT, THE PROPOSED FINISH GRADE SHALL NOT BE < EL.=94.83 FOR A DISTANCE OF 15' AROUND THE PERIMETER OF THE S.A.S. PROPOSED S.A.S. INSTALL 1 INSPECTION PORT(MIN.) CHARCOAL VENT AT END OF S.A.S. (CONNECT ALL ROWS) F.G. EL.=98.0 to 99.6f MAINTAIN 2% GRADE (MIN.) OVER S.A.S. NSPECTION PORT ONE (MIN.) 6 ROWS OF 5 UNITS AT 5.0'/UNIT) = 25.0' SOIL ABSORPTION SYSTEM (PROFILE) 2.83 ADS BIAXIAL GEOGRID / BX114GG , OR EQUAL PLACED 5" to 6" ABOVE FILTER FABRIC EXTEND GEOGRID FOR 2' ON ALL SIDES OF UNITS ESTABLISH VEGETATIVE COVER CLEAN NATIVE BACKFILL PLACE 1" to 3/4" t DOUBLE WASHED STONE F--BETWEEN CHAMBERS TO TOP OF UNITS EFFECTIVE WIDTH=17 I PLACE APPROVED FILTER FABRIC OVER STONE EXISTING SUITABLE MATERIAL USE 6 ROWS OF 5—ADS Arc 36 HC HD UNITS WITH NO STONE AND NO SEPARATION BETWEEN EACH ROW TYPICAL SECTION SOIL LOG DATE: JANUARY 6, 2021 SOIL EVALUATOR: CHRIS McENTEE PE, SE-14092 WITNESS: MALLORY LANGLER HEALTH AGENT ELEV. T P DEPTH 99.3 A 0" SANDY LOAM 10YR 4/3 98.5 1 0" B LOAMY SAND 10YR 5/6 96.5 C 34" PERC MED. SAND 10YR 5/4 88.5 ADJ. GW — 86.5 STDG. GW* _ 89.1 122" PERC RATE 2 MIN/IN. ("C" HORIZON) NO GROUNDWATER ENCOUNTERED WATER SURFACE OF BOG, EL.=86.9 *WATER LEVEL IN MONITORING, EL.=86.5 INDEX WELL MIW 29 WATER LEVEL=8.7 JAN 2021 ZONE A ADJUSTMENT = 2.0', EST. HIGH GW=88.5 ,EXISTING HOUSE(#7) TO.F=96.9t, n� (varies) ` O PORCH J _ 32.3' " / 11 PROPOSED S.A.S. 6 ROWS OF 5 Arc36 HC HD UNITS ON SAND WITH STONE BETWEEN S.A.S. LAYOUT 3: END CAP END CAP FRONT VIEW SIDE VIEW rr•IMM121IM NOTE: UNIT CONFIGURATION AND AVAILABILITY SUBJECT TO CHANGE WITHOUT NOTICE. PRODUCT DETAIL MAY DIFFER SLIGHTLY FROM ACTUAL PRODUCT APPEARANCE. 4640 TRUEMAN BLVD ,31111111111111 HILUARD, oHlo 4so26 muilu-x; ® artur Arc 36 HC DETAIL ADVANCED DRAINAGE SYSTEMS, INC. UNITS MUST BE STAMPED HD PROPOSED SEPTIC SYSTEM UPGRADE PLAN 7 TRENTON STREET, SOUTH YARMOUTH, MA Prepared for: Brendan McNamara, 230 Rancho Santa Fe Rd, Encinitas, CA 92024 Engineering by: SCALE DRAWN JOB. NO. Engineering Works, Inc. N.T.S. P.T.M. 331-20 12 West Crossfield Road, Forestdale, MA 02644 DATE CHECKED SHEET No. (508) 477-5313 2/27/21 P.T.M. 2 Of 2